http://www.pdfcompressor.org/
PDF Compressor allows you to compress PDF files, reduce pdf file size easily and quickly. It offers an easy-to-use UI. With this handy tool, you can shrink PDF files, reduce the size of PDF files noticeably without any quality loss. The application can process thousands of PDF files at one time. The user interface is intuitive and easy to use, no learning curve, no skill needed.